package com.bitejiuyeke.forum.services.impl;

import com.bitejiuyeke.forum.common.AppResult;
import com.bitejiuyeke.forum.common.ResultCode;
import com.bitejiuyeke.forum.dao.BoardMapper;
import com.bitejiuyeke.forum.exception.ApplicationException;
import com.bitejiuyeke.forum.model.Board;
import com.bitejiuyeke.forum.services.IBoradService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 666
 * Date: 2023-12-04
 * Time: 22:08
 */
@Service
@Slf4j

public class BoardServiceImpl implements IBoradService {
    @Resource
    private BoardMapper boardMapper;

    @Override
    public List<Board> selectByNum(Integer num) {
        //非空校验
        if (num <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //
        List<Board> result = boardMapper.selectByNum(num);
        return result;
    }

    @Override
    public Board selectById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_BOARD_ARTICLE_COUNT.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_ARTICLE_COUNT));
        }
        //使用dao查询数据
        Board board = boardMapper.selectByPrimaryKey(id);
        return board;
    }

    @Override
    public void addOneArticleCountById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_BOARD_ARTICLE_COUNT.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_ARTICLE_COUNT));
        }
        // 查询对应的板块
        Board board = boardMapper.selectByPrimaryKey(id);
        if (board == null) {
            log.warn(ResultCode.ERROR_IS_NULL.toString() + "board id" + id);
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_IS_NULL));
        }
        //更新帖子数量
        Board updateBoard = new Board();
        updateBoard.setArticleCount(board.getArticleCount() + 1);
        updateBoard.setId(board.getId());
        int row = boardMapper.updateByPrimaryKeySelective(updateBoard);
        if (row != 1) {
            log.warn(ResultCode.FAILED.toString() + " 操作失败");
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED));

        }
    }

    @Override
    public void subOneArticleCountById(Long id) {
    //非空检验
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_BOARD_ARTICLE_COUNT.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_ARTICLE_COUNT));
        }
        //查询对应的板块
        Board board = boardMapper.selectByPrimaryKey(id);
        if (board == null) {
            log.warn(ResultCode.ERROR_IS_NULL.toString() + "board id" + id);
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_IS_NULL));
        }
        //更新帖子数量
        Board updateBoard = new Board();
        updateBoard.setId(board.getId());
        updateBoard.setArticleCount(board.getArticleCount() - 1);
        //判断减一之后是否小于0
        if (updateBoard.getArticleCount() < 0) {
            updateBoard.setArticleCount(0);
        }
        int row = boardMapper.updateByPrimaryKeySelective(updateBoard);
        if (row != 1) {
            log.warn(ResultCode.FAILED.toString() + " 操作失败");
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED));

        }
    }
}